Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Volume 213, 2019
Previous Article Next Article

Structural transition pathway and bipolar switching of the GeTe–Sb2Te3 superlattice as interfacial phase-change memory

Author affiliations

Abstract

We investigated the resistive switching mechanism between the high-resistance state (HRS) and the low-resistance state (LRS) of the GeTe–Sb2Te3 (GST) superlattice. First-principles calculations were performed to identify the structural transition pathway and to evaluate the current–voltage (IV) characteristics of the GST device cell. After determining the atomistic structures of the stable structural phases of the GST superlattice, we found the structural transition pathways and the transition states of possible elementary processes in the device, which consisted of a thin film of GST superlattice and semi-infinite electrodes. The calculations of the IV characteristics were examined to identify the HRS and the LRS, and the results reasonably agreed with those of our previous study (H. Nakamura, et al., Nanoscale, 2017, 9, 9286). The calculated HRS/LRS and analysis of the transition states of the pathways suggest that a bipolar switching mode dominated by the electric-field effect is possible.

Graphical abstract: Structural transition pathway and bipolar switching of the GeTe–Sb2Te3 superlattice as interfacial phase-change memory

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 May 2018, accepted on 17 Jul 2018 and first published on 18 Jul 2018


Article type: Paper
DOI: 10.1039/C8FD00093J
Citation: Faraday Discuss., 2019,213, 303-319

  •   Request permissions

    Structural transition pathway and bipolar switching of the GeTe–Sb2Te3 superlattice as interfacial phase-change memory

    N. Inoue and H. Nakamura, Faraday Discuss., 2019, 213, 303
    DOI: 10.1039/C8FD00093J

Search articles by author

Spotlight

Advertisements